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[linux-rt-nao.git] / sound / pci / cs5535audio / cs5535audio_pcm.c
blob034c608795016fb0631da63a011ecb823a198317
1 /*
2 * Driver for audio on multifunction CS5535 companion device
3 * Copyright (C) Jaya Kumar
4 *
5 * Based on Jaroslav Kysela and Takashi Iwai's examples.
6 * This work was sponsored by CIS(M) Sdn Bhd.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * todo: add be fmt support, spdif, pm
23 */
24
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/pci.h>
28 #include <sound/core.h>
29 #include <sound/control.h>
30 #include <sound/initval.h>
31 #include <sound/asoundef.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/ac97_codec.h>
35 #include "cs5535audio.h"
36
37 static struct snd_pcm_hardware snd_cs5535audio_playback =
38 {
39 .info = (
40 SNDRV_PCM_INFO_MMAP |
41 SNDRV_PCM_INFO_INTERLEAVED |
42 SNDRV_PCM_INFO_BLOCK_TRANSFER |
43 SNDRV_PCM_INFO_MMAP_VALID |
44 SNDRV_PCM_INFO_PAUSE |
45 SNDRV_PCM_INFO_RESUME
46 ),
47 .formats = (
48 SNDRV_PCM_FMTBIT_S16_LE
49 ),
50 .rates = (
51 SNDRV_PCM_RATE_CONTINUOUS |
52 SNDRV_PCM_RATE_8000_48000
53 ),
54 .rate_min = 4000,
55 .rate_max = 48000,
56 .channels_min = 2,
57 .channels_max = 2,
58 .buffer_bytes_max = (128*1024),
59 .period_bytes_min = 16,
60 .period_bytes_max = (64*1024 - 16),
61 .periods_min = 1,
62 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS,
63 .fifo_size = 0,
64 };
65
66 static struct snd_pcm_hardware snd_cs5535audio_capture =
67 {
68 .info = (
69 SNDRV_PCM_INFO_MMAP |
70 SNDRV_PCM_INFO_INTERLEAVED |
71 SNDRV_PCM_INFO_BLOCK_TRANSFER |
72 SNDRV_PCM_INFO_MMAP_VALID
73 ),
74 .formats = (
75 SNDRV_PCM_FMTBIT_S16_LE
76 ),
77 .rates = (
78 SNDRV_PCM_RATE_CONTINUOUS |
79 SNDRV_PCM_RATE_8000_48000
80 ),
81 .rate_min = 48000,
82 .rate_max = 48000,
83 .channels_min = 4,
84 .channels_max = 4,
85 .buffer_bytes_max = (128*1024),
86 .period_bytes_min = 16384,
87 .period_bytes_max = (64*1024 - 16),
88 .periods_min = 1,
89 .periods_max = CS5535AUDIO_MAX_DESCRIPTORS / 3,
90 .fifo_size = 0,
91 };
92
93 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
94 {
95 int err;
96 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
97 struct snd_pcm_runtime *runtime = substream->runtime;
98
99 runtime->hw = snd_cs5535audio_playback;
100 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
101 snd_pcm_limit_hw_rates(runtime);
102 cs5535au->playback_substream = substream;
103 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
104 if ((err = snd_pcm_hw_constraint_integer(runtime,
105 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
106 return err;
107
108 return 0;
109 }
110
111 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
112 {
113 return 0;
114 }
115
116 #define CS5535AUDIO_DESC_LIST_SIZE \
117 PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
118
119 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
120 struct cs5535audio_dma *dma,
121 struct snd_pcm_substream *substream,
122 unsigned int periods,
123 unsigned int period_bytes,
124 unsigned int dma_channels,
125 unsigned short dma_stereo)
126 {
127 unsigned int i, j, descr, stereo, period_bytes_channel;
128 u32 addr, desc_addr, jmpprd_addr[4];
129 struct cs5535audio_dma_desc *lastdesc;
130 char *dma_area;
131
132 if (periods > CS5535AUDIO_MAX_DESCRIPTORS / 3)
133 return -ENOMEM;
134
135 #if 0
136 printk(KERN_INFO "cs5535audio_build_dma_packets: %u periods, %u period_bytes\n",
137 periods, period_bytes);
138 printk(KERN_INFO "cs5535audio_build_dma_packets: addr = %x (%u)\n",
139 (u32)substream->runtime->dma_addr, (u32)substream->runtime->dma_bytes);
140 printk(KERN_INFO "cs5535audio_build_dma_packets: runtime channels = %u\n",
141 substream->runtime->channels);
142 printk(KERN_INFO "cs5535audio_build_dma_packets: runtime frame bits = %u\n",
143 substream->runtime->frame_bits);
144 printk(KERN_INFO "cs5535audio_build_dma_packets: runtime sample bits = %u\n",
145 substream->runtime->sample_bits);
146 printk(KERN_INFO "cs5535audio_build_dma_packets: runtime format = %u\n",
147 (unsigned)substream->runtime->format);
148 printk(KERN_INFO "cs5535audio_build_dma_packets: dma channels = %u\n",
149 dma_channels);
150 #endif
151
152 if (dma->desc_buf.area == NULL) {
153 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
154 snd_dma_pci_data(cs5535au->pci),
155 CS5535AUDIO_DESC_LIST_SIZE+1,
156 &dma->desc_buf) < 0)
157 return -ENOMEM;
158 dma->period_bytes = dma->periods = 0;
159 }
160
161 if (dma->periods == periods && dma->period_bytes == period_bytes)
162 return 0;
163
164 dma->dma_stereo = dma_stereo;
165 /* the u32 cast is okay because in snd*create we successfully told
166 pci alloc that we're only 32 bit capable so the uppper will be 0 */
167 addr = (u32) substream->runtime->dma_addr;
168 desc_addr = (u32) dma->desc_buf.addr;
169 descr = 0;
170 dma_area = substream->runtime->dma_area;
171 for (j = 0; j < dma_channels; j++) {
172 stereo = dma_stereo & 1;
173 dma_stereo >>= 1;
174 dma->dma_start[j] = dma_area;
175 jmpprd_addr[j] = cpu_to_le32(desc_addr);
176 if (dma_channels > 1)
177 period_bytes_channel = stereo ? (period_bytes / 2) : (period_bytes / 4);
178 else
179 period_bytes_channel = period_bytes;
180 #if 0
181 printk(KERN_INFO "cs5535audio_build_dma_packets: dma channel %u (stereo: %u) at %x, size %u\n",
182 j, stereo, jmpprd_addr[j], period_bytes_channel);
183 #endif
184 for (i = 0; i < periods; i++) {
185 struct cs5535audio_dma_desc *desc =
186 &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[descr++];
187 desc->addr = cpu_to_le32(addr);
188 desc->size = cpu_to_le32(period_bytes_channel);
189 desc->ctlreserved = cpu_to_le32(PRD_EOP);
190 #if 0
191 printk(KERN_INFO "cs5535audio_build_dma_packets: building descriptor %d at %x -> %x (%x)\n",
192 descr-1, desc_addr, addr, (unsigned)dma_area);
193 #endif
194 desc_addr += sizeof(struct cs5535audio_dma_desc);
195 addr += period_bytes_channel;
196 dma_area += period_bytes_channel;
197 }
198 /* we reserved one dummy descriptor at the end to do the PRD jump */
199 lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[descr++];
200 lastdesc->addr = jmpprd_addr[j];
201 lastdesc->size = 0;
202 lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
203 desc_addr += sizeof(struct cs5535audio_dma_desc);
204 }
205
206 dma->substream = substream;
207 dma->period_bytes = period_bytes;
208 dma->periods = periods;
209 spin_lock_irq(&cs5535au->reg_lock);
210 dma->ops->disable_dma(cs5535au);
211 dma->ops->setup_prd(cs5535au, jmpprd_addr);
212 spin_unlock_irq(&cs5535au->reg_lock);
213 return 0;
214 }
215
216 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
217 {
218 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
219 }
220
221 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
222 {
223 cs_writeb(cs5535au, ACC_BM0_CMD, 0);
224 }
225
226 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
227 {
228 cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
229 }
230
231 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
232 u32 *prd_addr)
233 {
234 cs_writel(cs5535au, ACC_BM0_PRD, prd_addr[0]);
235 }
236
237 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
238 {
239 return cs_readl(cs5535au, ACC_BM0_PRD);
240 }
241
242 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
243 {
244 return cs_readl(cs5535au, ACC_BM0_PNTR);
245 }
246
247 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
248 {
249 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
250 cs_writeb(cs5535au, ACC_BM3_CMD, BM_CTL_EN);
251 cs_writeb(cs5535au, ACC_BM5_CMD, BM_CTL_EN);
252 }
253
254 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
255 {
256 cs_writeb(cs5535au, ACC_BM1_CMD, 0);
257 cs_writeb(cs5535au, ACC_BM3_CMD, 0);
258 cs_writeb(cs5535au, ACC_BM5_CMD, 0);
259 }
260
261 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
262 {
263 cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
264 cs_writeb(cs5535au, ACC_BM3_CMD, BM_CTL_PAUSE);
265 cs_writeb(cs5535au, ACC_BM5_CMD, BM_CTL_PAUSE);
266 }
267
268 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
269 u32 *prd_addr)
270 {
271 cs_writel(cs5535au, ACC_BM1_PRD, prd_addr[0]);
272 cs_writel(cs5535au, ACC_BM3_PRD, prd_addr[1]);
273 cs_writel(cs5535au, ACC_BM5_PRD, prd_addr[2]);
274 }
275
276 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
277 {
278 return cs_readl(cs5535au, ACC_BM1_PRD);
279 }
280
281 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
282 {
283 u32 pntr = cs_readl(cs5535au, ACC_BM1_PNTR);
284 return pntr;
285 }
286
287 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
288 struct cs5535audio_dma *dma,
289 struct snd_pcm_substream *substream)
290 {
291 snd_dma_free_pages(&dma->desc_buf);
292 dma->desc_buf.area = NULL;
293 dma->substream = NULL;
294 }
295
296 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
297 struct snd_pcm_hw_params *hw_params)
298 {
299 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
300 struct cs5535audio_dma *dma = substream->runtime->private_data;
301 int err;
302
303 err = snd_pcm_lib_malloc_pages(substream,
304 params_buffer_bytes(hw_params));
305 if (err < 0)
306 return err;
307 dma->buf_addr = substream->runtime->dma_addr;
308 dma->buf_bytes = params_buffer_bytes(hw_params);
309
310 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
311 params_periods(hw_params),
312 params_period_bytes(hw_params), 1, 1);
313 if (!err)
314 dma->pcm_open_flag = 1;
315 return err;
316 }
317
318 static int snd_cs5535audio_hw_params_muldma(struct snd_pcm_substream *substream,
319 struct snd_pcm_hw_params *hw_params)
320 {
321 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
322 struct cs5535audio_dma *dma = substream->runtime->private_data;
323 int err;
324
325 err = snd_pcm_lib_malloc_pages(substream,
326 params_buffer_bytes(hw_params)*4);
327 if (err < 0)
328 return err;
329 dma->buf_addr = substream->runtime->dma_addr;
330 dma->buf_bytes = params_buffer_bytes(hw_params) * 4;
331
332 err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
333 params_periods(hw_params),
334 params_period_bytes(hw_params), 3, 1);
335 return err;
336 }
337
338 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
339 {
340 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
341 struct cs5535audio_dma *dma = substream->runtime->private_data;
342
343 if (dma->pcm_open_flag) {
344 if (substream == cs5535au->playback_substream)
345 snd_ac97_update_power(cs5535au->ac97,
346 AC97_PCM_FRONT_DAC_RATE, 0);
347 else
348 snd_ac97_update_power(cs5535au->ac97,
349 AC97_PCM_LR_ADC_RATE, 0);
350 dma->pcm_open_flag = 0;
351 }
352 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
353 return snd_pcm_lib_free_pages(substream);
354 }
355
356 static int snd_cs5535audio_hw_free_muldma(struct snd_pcm_substream *substream)
357 {
358 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
359 struct cs5535audio_dma *dma = substream->runtime->private_data;
360
361 cs5535audio_clear_dma_packets(cs5535au, dma, substream);
362 return snd_pcm_lib_free_pages(substream);
363 }
364
365 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
366 {
367 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
368 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
369 substream->runtime->rate);
370 }
371
372 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
373 {
374 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
375 struct cs5535audio_dma *dma = substream->runtime->private_data;
376 int err = 0;
377
378 spin_lock(&cs5535au->reg_lock);
379 switch (cmd) {
380 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
381 dma->ops->pause_dma(cs5535au);
382 break;
383 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
384 dma->ops->enable_dma(cs5535au);
385 break;
386 case SNDRV_PCM_TRIGGER_START:
387 dma->ops->enable_dma(cs5535au);
388 break;
389 case SNDRV_PCM_TRIGGER_RESUME:
390 dma->ops->enable_dma(cs5535au);
391 break;
392 case SNDRV_PCM_TRIGGER_STOP:
393 dma->ops->disable_dma(cs5535au);
394 break;
395 case SNDRV_PCM_TRIGGER_SUSPEND:
396 dma->ops->disable_dma(cs5535au);
397 break;
398 default:
399 snd_printk(KERN_ERR "unhandled trigger\n");
400 err = -EINVAL;
401 break;
402 }
403 spin_unlock(&cs5535au->reg_lock);
404 return err;
405 }
406
407 static snd_pcm_uframes_t snd_cs5535audio_playback_pcm_pointer(struct snd_pcm_substream
408 *substream)
409 {
410 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
411 u32 curdma;
412 struct cs5535audio_dma *dma;
413
414 dma = substream->runtime->private_data;
415 curdma = dma->ops->read_dma_pntr(cs5535au);
416 if (curdma < dma->buf_addr) {
417 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
418 curdma, dma->buf_addr);
419 return 0;
420 }
421 curdma -= dma->buf_addr;
422 if (curdma >= dma->buf_bytes) {
423 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
424 curdma, dma->buf_bytes);
425 return 0;
426 }
427 return bytes_to_frames(substream->runtime, curdma);
428 }
429
430
431 static snd_pcm_uframes_t snd_cs5535audio_capture_pcm_pointer(struct snd_pcm_substream
432 *substream)
433 {
434 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
435 u32 curdma;
436 struct cs5535audio_dma *dma;
437
438 dma = substream->runtime->private_data;
439 curdma = dma->ops->read_dma_pntr(cs5535au);
440 if (curdma < dma->buf_addr) {
441 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
442 curdma, dma->buf_addr);
443 return 0;
444 }
445 #if 0
446 printk(KERN_INFO "snd_cs5535audio_pcm_pointer: %x (%u)\n", curdma, curdma - dma->buf_addr);
447 #endif
448 curdma -= dma->buf_addr;
449 if (curdma >= dma->buf_bytes) {
450 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
451 curdma, dma->buf_bytes);
452 return 0;
453 }
454 #if 0
455 printk(KERN_INFO "snd_cs5535audio_pcm_pointer: bytes_to_frames: %u (x2 = %u)\n",
456 (unsigned)bytes_to_frames(substream->runtime, curdma),
457 (unsigned)bytes_to_frames(substream->runtime, curdma) * 2);
458 #endif
459 return bytes_to_frames(substream->runtime, curdma) * 2;
460 }
461
462 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
463 {
464 int err;
465 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
466 struct snd_pcm_runtime *runtime = substream->runtime;
467
468 #if 0
469 printk(KERN_INFO "snd_cs5535audio_capture_open\n");
470 #endif
471 runtime->hw = snd_cs5535audio_capture;
472 runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
473 snd_pcm_limit_hw_rates(runtime);
474 cs5535au->capture_substream = substream;
475 runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
476 if ((err = snd_pcm_hw_constraint_integer(runtime,
477 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
478 return err;
479 olpc_capture_open(cs5535au->ac97);
480 return 0;
481 }
482
483 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
484 {
485 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
486 olpc_capture_close(cs5535au->ac97);
487 return 0;
488 }
489
490 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
491 {
492 struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
493 return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
494 substream->runtime->rate);
495 }
496
497 static int snd_cs5535audio_capture_copy(struct snd_pcm_substream *substream,
498 int channel, snd_pcm_uframes_t hwoff,
499 void __user *ubuf, snd_pcm_uframes_t frames)
500 {
501 struct snd_pcm_runtime *runtime = substream->runtime;
502 struct cs5535audio_dma *dma = (struct cs5535audio_dma *)runtime->private_data;
503 char *buffer = ((struct cs5535audio *)substream->pcm->card->private_data)->
504 channel_rebuild_buffer;
505 char *hwbuf;
506 int i, j, frame_offset, frame_size;
507
508 //CG: dont know what to do? do this really fail? lol
509 /* snd_assert(runtime->dma_area, return -EFAULT); */
510 /* snd_assert(channel == -1, return -EFAULT); */
511
512 #if 0
513 printk(KERN_INFO "snd_cs5535audio_capture_copy: channel %d, frames %u, hwoff: %u\n",
514 channel, (unsigned)frames, (unsigned)hwoff);
515 printk(KERN_INFO "snd_cs5535audio_capture_copy: frame size is %u, will copy %u bytes\n",
516 (unsigned)frames_to_bytes(runtime, 1), (unsigned)frames_to_bytes(runtime, frames));
517 #endif
518
519 if (frames * 8 > 64*1024 - 16) {
520 printk(KERN_ERR "channel_rebuild_buffer overrun (%u > %u)\n",
521 (unsigned)(frames * 8), (unsigned)(64*1024 - 16));
522 return -EFAULT;
523 }
524
525 memset(buffer, 0, frames_to_bytes(runtime, frames));
526 frame_offset = 0;
527 frame_size = 4;
528 for (j = 0; j < 3; j++) {
529 if (dma->dma_stereo >> j)
530 frame_size = 4;
531 else
532 frame_size = 2;
533 hwbuf = (char*)(dma->dma_start[j] + hwoff * frame_size);
534 #if 0
535 printk(KERN_INFO "snd_cs5535audio_capture_copy: copying dma channel %d (%d:%d) from %x\n",
536 j, frame_size, frame_offset, (unsigned)hwbuf);
537 #endif
538 for (i = 0; i < frames; i++) {
539 memcpy(buffer + frame_offset + i*8, hwbuf + i*frame_size, frame_size);
540 }
541 frame_offset += frame_size;
542 }
543
544 if (copy_to_user(ubuf, buffer, frames_to_bytes(runtime, frames)))
545 return -EFAULT;
546
547 return 0;
548 }
549
550 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
551 .open = snd_cs5535audio_playback_open,
552 .close = snd_cs5535audio_playback_close,
553 .ioctl = snd_pcm_lib_ioctl,
554 .hw_params = snd_cs5535audio_hw_params,
555 .hw_free = snd_cs5535audio_hw_free,
556 .prepare = snd_cs5535audio_playback_prepare,
557 .trigger = snd_cs5535audio_trigger,
558 .pointer = snd_cs5535audio_playback_pcm_pointer,
559 };
560
561 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
562 .open = snd_cs5535audio_capture_open,
563 .close = snd_cs5535audio_capture_close,
564 .ioctl = snd_pcm_lib_ioctl,
565 .hw_params = snd_cs5535audio_hw_params_muldma,
566 .hw_free = snd_cs5535audio_hw_free_muldma,
567 .prepare = snd_cs5535audio_capture_prepare,
568 .trigger = snd_cs5535audio_trigger,
569 .pointer = snd_cs5535audio_capture_pcm_pointer,
570 .copy = snd_cs5535audio_capture_copy,
571 };
572
573 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
574 .type = CS5535AUDIO_DMA_PLAYBACK,
575 .enable_dma = cs5535audio_playback_enable_dma,
576 .disable_dma = cs5535audio_playback_disable_dma,
577 .setup_prd = cs5535audio_playback_setup_prd,
578 .read_prd = cs5535audio_playback_read_prd,
579 .pause_dma = cs5535audio_playback_pause_dma,
580 .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
581 };
582
583 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
584 .type = CS5535AUDIO_DMA_CAPTURE,
585 .enable_dma = cs5535audio_capture_enable_dma,
586 .disable_dma = cs5535audio_capture_disable_dma,
587 .setup_prd = cs5535audio_capture_setup_prd,
588 .read_prd = cs5535audio_capture_read_prd,
589 .pause_dma = cs5535audio_capture_pause_dma,
590 .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
591 };
592
593 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
594 {
595 struct snd_pcm *pcm;
596 int err;
597
598 err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
599 if (err < 0)
600 return err;
601
602 cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
603 &snd_cs5535audio_playback_dma_ops;
604 cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
605 &snd_cs5535audio_capture_dma_ops;
606 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
607 &snd_cs5535audio_playback_ops);
608 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
609 &snd_cs5535audio_capture_ops);
610
611 pcm->private_data = cs5535au;
612 pcm->info_flags = 0;
613 strcpy(pcm->name, "CS5535 Audio");
614
615 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
616 snd_dma_pci_data(cs5535au->pci),
617 64*1024, 128*1024);
618 cs5535au->pcm = pcm;
619
620 return 0;
621 }
622
(Inofficial) Linux kernel tree running on the Nao robot